EMC CLARiiON CX3 Series DC Power Systems · PDF fileEMC CLARiiON CX3 Series DC Power Systems Applied Technology Abstract This white paper introduces the full architecture and functionality

EMC CLARiiON CX3 Series DC Power Systems

Applied Technology

Abstract

This white paper introduces the full architecture and functionality of the EMC® CLARiiON® CX3 UltraScale™ series DC-powered systems, including the CX3-10 DC, CX3-20 DC, and CX3-40 DC.

March 2008

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Part Number H4099.1

EMC CLARiiON CX3 Series DC Power Systems Applied Technology 2

Table of Contents Executive summary ............................................................................................4 Introduction.........................................................................................................4

Audience ...................................................................................................................................... 4 DC system overview...........................................................................................4

Where the DC-powered CX3 fits into CLARiiON storage............................................................ 5 CX3 Model 40 DC system ...................................................................................6

Storage processor........................................................................................................................ 6 CX3 Model 20 DC system ...................................................................................7

Storage processor........................................................................................................................ 7 CX3 Model 10 DC system ...................................................................................8

Storage processor........................................................................................................................ 8 CX3 UltraScale DC-powered 4 Gb/s UltraPoint DAE........................................9 Powering sequences ..........................................................................................9

Powerup sequence .................................................................................................................... 10 Powerdown sequence................................................................................................................ 10

Standards certification and compliance .........................................................11 Conclusion ........................................................................................................11 References ........................................................................................................11


Executive summary EMC® CLARiiON® CX3 DC-powered storage systems are based on the same breakthrough architecture and extensive technological innovation as their AC counterparts. The DC-powered product line delivers the same industry-leading performance that customers have come to expect from EMC products.

DC-powered systems work in harsh and demanding environments, and are designed to be NEBS level 3 compliant. NEBS level 3 is an especially demanding certification. Although it is not legally mandated, EMC has certified each of the DC systems with all NEBS level 3 requirements to ensure that systems deployed in harsh environments perform consistently and reliably.

Introduction This white paper introduces the CLARiiON CX3 DC power storage systems. It describes the hardware associated with the CX3 DC systems, and the differences between AC- and DC-powered systems. The powerup and powerdown sequences for these systems are also discussed.

This paper also highlights the operating conditions of each piece of DC hardware. Finally, this paper examines the levels of certification that the CX3 DC systems have obtained.

Audience This white paper is intended for EMC employees, partners, IT planners, storage architects, administrators, and any others involved in evaluating, acquiring, managing, operating, or designing an EMC networked storage environment.

DC system overview The DC CX3 UltraScale series storage systems are made up of the following modular components:

• A 4 Gb/s storage processor enclosure (SPE) houses the storage processors (SPs). • A 4 Gb/s UltraPoint™ DC-powered disk-array enclosure (DAE) houses up to 15 drives. Additional

DAEs can be added for a maximum of 60 drives for Model 10 DC, 120 drives for Model 20 DC, and 240 drives for Model 40 DC1.

Figure 1. CX3 DC power supplies and cooling

All CX3 DC models utilize the SPE shown in Figure 1. Each SPE includes four power supplies, two per SP. Both SPs are configured with N+1 power and N+1 cooling. The power supplies contain thermal sensors for ambient over-temperature monitoring. High speed blowers are attached to each power supply for cooling. A single power supply can power a single SP and a single blower can cool a single SP. Either

1 DC-powered arrays do not use a standby power supply (SPS).


SP can have a single fault and still maintain write caching. The CX3 DC systems can run (and maintain high availability) indefinitely with one power supply/blower module faulted or removed on each SP. Like their AC counterparts, the DC systems utilize the enhancements in the UltraPoint DAEs. These enhancements include increased fault isolation, link testing, and 2 Gb/s versus 4 Gb/s auto-sense. UltraPoint’s auto-sense speed setting provides the UltraScale architecture with the flexibility to use a combination of 2 and 4 Gb/s drives simultaneously.

Where the DC-powered CX3 fits into CLARiiON storage For environments where AC power is not an option, EMC has introduced three DC models. The CX3-10, CX3-20, and CX3-40 are now available in AC and DC configurations. DC-powered systems are often used in telecommunications, gas, oil, and federal applications. These DC units are ideally suited to unique environments. Occasionally, these unique deployments face harsh environmental conditions. For this reason, the new DC-powered systems are ETSI- and NEBS-compliant.

The CX3 DC-powered systems are NEBS level 3 compliant. This certification is used to ensure that systems deployed in harsh environments perform consistently and reliably. Temperature, humidity, fire, earthquake, vibration, acoustic, air quality, and electrical safety testing are just a few of the rigors that systems must endure to be fully NEBS-compliant. These tests are exceptionally important for systems operating in unique environments, but their benefits extend to all deployments.

Table 1. Comparison of the CX3 UltraScale series DC power systems

Components/Connectivity CX3 Model 10 CX3 Model 20 CX3 Model 40

Processor architecture per SP2 1 processor 1.8 GHz

1 processor 2.8 GHz

2 processors 2.8 GHz

Physical memory per SP 1 GB 2 GB 4 GB Max system cache 310 MB 1053 MB 3016 MB Max write cache per system 310 MB 1053 MB 2500 MB Front-end 4 Gb/s FC ports per SP3 4 6 4 Back-end 4 Gb/s FC ports per SP4 1 1 4 Max drives per storage system 60 120 240 Min drives per storage system 5 5 5 Max initiators per storage system 128 256 256 Max H/A hosts per storage system 64 128 128 Max LUNs per storage system 512 1024 2048 Max RAID groups per storage system 30 60 120 Max drives per RAID group 16 16 16 Max LUNs per RAID group 128 128 128 SPE form factor 2 U 2 U 2 U Minimum configuration form factor 5U 5U 5U 73, 146 and 300 GB 4 Gb/s 15k rpm Fibre Channel Yes Yes Yes 73, 146, and 300 GB 2 Gb/s 10k rpm Fibre Channel Yes5 Yes Yes

2 All models in the CX3 series have two SPs. 3 Front-end ports connect the storage system to the SAN or direct-attach host. 4 Back-end ports connect the storage system to other DAEs. 5 CX3-10 does not support 73 GB 10k rpm drives


CX3 Model 40 DC system The minimum CX3 Model 40 DC assembly consists of a single 2U SPE and a 3U 4 Gb/s UltraPoint disk-array enclosure (DAE), for a total of 5U. A fully configured CX3 Model 40 DC consists of the SPE plus 16 3U DAEs, for a total of 50U, and requires one additional cabinet.

The SPE and DAE assemblies are rackmounted for efficiency, and provide the user with many configuration options. The CX3-40 DC system can be mounted in one of three ways. Customers can utilize EMC’s 40U Titan cabinet, a Telco rail self-supporting rack, or a third-party rack.

Storage processor Each CX3 Model 40 DC SP contains two 2.8 GHz, 1 MB L2-cache Intel Xeon processors. This dual-SP architecture provides the power for enhanced performance, stability, and reliability in the CX3 Model 40 DC storage system. Each CX3 Model 40 DC SP has 4 GB of system memory. A PCI Express-x4 CMI channel between the SPs is used for communication and messaging between the SPs and to mirror data that is written to the storage system’s write cache.

2 front-end FC ports (per SP)2 back-end port (per SP)

2 back-end port (per SP) 2 front-end FC ports (per SP)

Figure 2. Air dam of CX3 Model 40 DC storage processor’s front-end and back-end ports Figure 2 shows the air dam for a CX3 Model 40 DC storage processor. Each CX3 Model 40 DC SP has four 4 Gb/s Fibre Channel front-end (FE) ports. By default, the FE ports are set to auto-negotiate. The user can change the settings from auto-negotiate to 1, 2, or 4 Gb/s using Navisphere® Manager or CLI. These ports are customer-replaceable small-form-factor pluggable optical transceivers. Each SP also has four 4 Gb/s Fibre Channel back-end ports, which, along with the peer SP, form four redundant FC back-end loops for disk connectivity and capacity expansion.

LEDs provide indications of LAN connectivity, SP power, boot progress, and fault status, as well as power supply and blower status. The LEDs also indicate the speed at which the front- and back-end ports are running – green indicates 2 Gb/s and blue indicates 4 Gb/s.


Table 2. CX3 Model 40 SPE DC ratings

CX3-40 DC SPE3 Rating

DC line voltage -36 V to -72 Vdc (Nominal -48 V or -60 V power systems)

DC line current 9.0 A max. at -36 Vdc, 6.8 A typical at -48 Vdc

Power consumption 325 W max.

Heat dissipation 1.17 x 106 J/hr, (1,110 BTU/hr) max.

Inrush current 24 A peak, per requirements in EN300 132-2 Sect. 4.7 limit curve

DC protection 10 A fuse on each power supply

DC inlet type Positronic Industries PLA06M4B0A1-436.0

Mating DC connector Positronic Industries PLA06F7050/AA

Ride-through time 10 ms min. at -48 V input

Current sharing 60% max., 40% min. between power supplies

CX3 Model 20 DC system The minimum CX3 Model 20 DC assembly consists of a single 2U SPE and a 3U 4 Gb/s UltraPoint DAE, for a total of 5U. A fully configured CX3 Model 20 DC consists of the SPE and dual SPSs, plus eight 3U DAEs, for a total of 26U.

The SPE and DAE assemblies are rackmounted for efficiency, and provide the user with many configuration options. The CX3-20 DC system can be mounted in one of three ways. Customers can utilize an EMC 40U Titan cabinet, a Telco rail self-supporting rack, or a third-party rack.

Storage processor Each CX3 Model 20 DC SP contains one 2.8 GHz, 1 MB L2-cache Intel Xeon processor. This dual-storage processor architecture provides the power for enhanced performance, stability, and reliability in the CX3 Model 20 DC storage system. Each CX3 Model 20 DC SP has 2 GB of system memory. There is a PCI Express-x4 CMI channel between the SPs that is used for communication and messaging between the SPs and to mirror data that is written to storage system’s write cache.

-

2 front-end FC ports (per SP)1 back-end port (per SP)

4 front-end FC ports (per SP)

Figure 3. Air dam of CX3 Model 20 storage processor’s front-end and back-end ports


Figure 3 shows the air dam for a CX3 Model 20 DC storage processor. Each CX3 Model 20 DC SP has six 4 Gb/s Fibre Channel front-end (FE) ports. By default, the FE ports are set to auto-negotiate. The user can change the settings from auto-negotiate to 1, 2, or 4 Gb/s using Navisphere Manager or CLI. These ports are customer-replaceable small-form-factor pluggable (SFP) optical transceivers. Each SP also has one 4 Gb/s Fibre Channel back-end port, which, along with the peer SP, forms a redundant FC back-end loop for disk connectivity and capacity expansion.




DC line voltage -36 V to -72 Vdc (Nominal -48 V or -60 V power systems)



Heat dissipation 0.95 x 106 J/hr, (905 BTU/hr) max.







CX3 Model 10 DC system The minimum CX3 Model 10 DC assembly consists of a single 2U SPE and a 3U 4 Gb/s UltraPoint disk-array enclosure (DAE), for a total of 5U. A fully configured CX3 Model 10 DC consists of the SPE plus four 3U DAEs, for a total of 14U.

The SPE and DAE assemblies are rackmounted for efficiency, and provide the user with many configuration options. The CX3-10 DC system can be mounted in one of three ways. Customers can utilize EMC’s 40U Titan cabinet, a Telco rail self-supporting rack, or a third-party rack.

Storage processor Each CX3 Model 10 DC SP contains one 1.8 GHz, 1 MB L2-cache Intel Xeon processor. This dual-storage processor architecture provides the power for enhanced performance, stability, and reliability in the CX3 Model 10 DC storage system. Each CX3 Model 10 DC SP has 1 GB of system memory. There is a PCI Express-x4 CMI channel between the storage processors that is used for communication and messaging between the SPs and to mirror data that is written to the storage system’s write cache. Each CX3 Model 10 DC SP has four 4 Gb/s Fibre Channel front-end (FE) ports. By default, the FE ports are set to auto-negotiate. The user can change the settings from auto-negotiate to 1, 2, or 4 Gb/s using Navisphere Manager or CLI. These ports are customer-replaceable small-form-factor pluggable (SFP) optical transceivers. Each SP also has one 4 Gb/s Fibre Channel back-end port, which, along with the peer SP, forms a redundant FC back-end loop for disk connectivity and capacity expansion.





DC line voltage -36 V to -72 Vdc (Nominal -48V or -60V power systems)



Heat dissipation 905 BTU/hr max.







CX3 UltraScale DC-powered 4 Gb/s UltraPoint DAE The physical disk drives are stored in enclosures, or DAEs, which are separate from the storage processors. Each disk-array enclosure measures 3U in height and has room for up to fifteen 2 or 4 Gb/s drives. When looking at the front of the DAE, the drive numbering increases from 0, located at the left, to 14, located at the far right of the enclosure. The 4 Gb/s UltraPoint DAE has two link control cards (LCCs) that are capable of running at 2 or 4 Gb/s.

The user can visibly determine what speed the enclosure is operating at simply by looking at the LED on the front of the enclosure. The LED on the left-front of the enclosure indicates fault status. The LED on the right-front of the enclosure has three states of operation: Green, Blue, and Off. Green or Blue indicates that the enclosure is powered, and that the drives are operating at 2 or 4 Gb/s, respectively. The unit is not powered on when the LED is Off.

Table 5. 4-Gb/s UltraPoint DAE DC ratings

4-Gb/s UltraPoint DAE Rating

DC line voltage -36 V to -72 Vdc (Nominal -48V or -60V power systems)



Heat dissipation 1.53 x 106 J/hr, (1,450 BTU/hr) max.



DC inlet type Positronic Industries PLB3W3M1000

Mating DC connector Positronic Industries PLB3W3F7100A1

Ride-through Time 10 ms min. at -48 V input

Current Sharing 60% max., 40% min. between power supplies

Powering sequences In order to set the enclosure address, the DAE3P must be powered on. However, it cannot be part of a back-end bus. The enclosure address cannot be changed while the back end is connected. Therefore, the storage system should be powered up and the DAE3P enclosure addresses set before connecting back-end (disk I/O) cables.


Powerup sequence Follow these instructions to power up any of the CX3 DC-powered storage systems.

1. Press the power buttons on the SPE3 power supplies6.

2. Toggle the DAE3P power switches to the ON (-) position.

Powerdown sequence Follow these instructions to power down any of the CX3 DC-powered storage systems.

1. Stop all I/O activity to the storage system.

Stopping the I/O allows the SP to destage cache data, which may take some time. The length of time will be based on criteria such as the amount of cache, the amount of data in the cache, the type of data in the cache, and the target location on the disks, but it is typically less than one minute.

2. If the server connected to the storage system is running the UNIX operating system, unmount the file systems.

3. On the SPE3, toggle each power supply’s on/off switch to the off position.

Allow the power supply to complete its shutdown sequence before removing the power source. An orderly shutdown that flushes all cache can take up to several seconds before the host sends a STOP to the power supply.

4. Power down power strips A and B.

If you need to retain power to other systems in a rack/cabinet, leave the power strips powered up. If necessary, toggle the DAE3P power switches to the off position.

6 The Off position for the SPE3 power button is OUT, level with the protective cowl.


Standards certification and compliance Stand-alone CX3 series enclosures (CX3-10, CX3-20, CX3-40, and DAE3P) with DC power have been tested and certified for compliance with the international environmental and safety specifications listed in Table 6. Each enclosure is marked to indicate such compliance and certification as required.

Table 6. Quality and safety standards for CX3 UltraScale series DC power systems

Quality and safety standards Description

CSAC 22.2 60950 EN 55022 Class A

UL 60950 CB Scheme IEC 60950-1999

GOST

Safety of Information Technology Equipment including Electrical Business Equipment

NEBS Level 3 Certification Network Equipment Building System GR-63-CORE

GR-1089-CORE GR-78-CORE

Telcordia Technologies Generic Requirements

ETSI EN 300 386 European Telecom Standard Institute RoHS Reduction of Hazardous Substances WEEE Waste Electrical Electronics Equipment

FCC Class A Class A, Radio Frequency Device Requirements CE Mark European EMC Directive & Low Voltage Directive Requirements

Conclusion The CLARiiON CX3 series DC power systems eliminate many of the typical limitations of AC power. The addition of the DC line allows incredible flexibility in deployment options. DC-powered arrays are an elegant solution when AC power is unavailable, for example in remote or harsh environments. For that reason, EMC’s DC-powered systems are designed and built to high standards, including NEBS level 3 compliance.

References The following can provide more information: • CX3-Series DC-Powered Enclosures for Telco Racks Installation and Operation Guide • EMC CLARiiON DC Power CX3 Model 10 Networked Storage System specification sheet • EMC CLARiiON DC Power CX3 Model 20 Networked Storage System specification sheet • EMC CLARiiON DC Power CX3 Model 40 Networked Storage System specification sheet • Customer Site Requirements for CLARiiON Storage Systems Equipped with DC Power Supplies white

paper • EMC Rails and Enclosures (CX3-Series Storage Systems) Field Installation Guide • CX-Series Hardware in NEBS-Compliant Environments Installation Guidelines


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EMC CLARiiON CX3 Series DC Power Systems · PDF fileEMC CLARiiON CX3 Series DC Power Systems Applied Technology Abstract This white paper introduces the full architecture and functionality